Muffle-leer.



H. MzTH'OMPSON.

MUFFLE LEER APPLICATION FILED OCT. 1. 1917.

Pateflted .Feb. 19; 1918.

INVENTOR I ATI'ORNEY H. THOMPSON! v MuF'FLE LEER.

APPLICATION FILED OCT. I. 1917.

. Patented Feb. 19, 1918 3 SHEETS-SHEET 2.

I I I I I I o/ x,

3 SHEETS-SHEET 3.

MUFFLE LEER.

APPLICATION FILED OCT. 1. 1917- H. M. THOMPSON.

INVENTOR ATTORNEY .tinrrnn sra rns arena series.

HARRY M. THOMPSON, OF WASHINGTON, PENNSYLVANIA.

Mumps-Luna.

' To all whom it may concern:

Washington, and State of Pennsylvania,

have invented certain new and useful Improvements, in Muflie-Leers, of which the following is a specification.

This invention relates broadly to annealing furnaces or leers for glassware, and more particularly to a leer of the continuous muflie type. f

Much trouble, inconvenience and expense has been experienced in the use of mufiie leers, as heretofore constructed, due to the instability of the flues-or courses through which are conducted the gases and products of combustion employed in heating the leer chamber, saidflues being commonly composed of hollowtiles disposed in arch form over the leer chamber. Due-to the intense heat to which they are subjected, the tilescomposing such fiues'become warped, distorted and otherwise injured to the extent that cracks,

velop, permitting gas and products of combustlon to escape into the leer chamber where, coming into contact with .the ware, it discolors and otherwise contaminates the ware rendering the same practically valueless. This is especially true in cases inrwhich raw producer gas is the fuel employed. It

" has. heretofore been necessary,'when such leakage occurred, to shut down and cool the leer, and then to tear out and rebuild or otherwise repair the'defective flue or flues.

It is the primary object of the present invention to provide a muiile-leer which will, in large measure, obviate the objectionable features of former leersof this character,

above referred to, such leer being so constructed that the danger of leakage of undesirable impurities from the muffle chamber to the leer chamber is minimized, affording comparative freedom from risk of contaminating the ware- A further object of the invention is to a muffle-leer in which the mufiie or the chamber through which the combustion are directed, is separatedfrom the leer chamber by a division wall or floor having substantial supports and which is not readily liable to become so affected by heat as to permit leakage, and which, when leakage does occur, may be reprovide chamber, products of fissures and the like quickly dewhich the burning gases erably of inverted-T shape,

Specification of Letters Patent. Patented Feb, 1918, Application filed October 1, 1917; Serial No. 194,132.

.tures referred to.

Another object is to provide a leer which 1s adapted to the use of natural gas, producer gas, oil, or any other fuel. With these and other objects in View, the invention resides in the features of construction, arrangement of parts and combinations of elements which will hereinafter be described, reference being had to the 2.0- companying drawings, in which- Figure l is a central longitudinal section of a muffle-leer embodying my invention;

Fig. 2 is a vertical section of the same on line 2-2, Fig. 1; and- Fig. 3 is a horizontal section on line 3-3, Fig, l. 1

Referring to said drawings, inwhich like designating characters distinguish like parts throughout the several views- 1 indicates the front end-wall and 2 and 3 the side walls of a furnace orleer, of the muflle type, and 4;designates the. leer chamber which is to be heated, said chamber having an endless ware carrier, as 5, operating therein. Located directly beneath the usual arch 6, which is formed of fire brick or other refractory material, is a mufiie chamber, generally designated by the numeral 7 through and heated products of combustion are conducted to the flue 8 which leads to the stack. Said muflle chamber 7 comprises a chamber 7? of suitable capacity located adjacent to the front end of the furnace or leer, and a plurality of relatively smaller chambers 7" arranged in succession and separated by division walls or bafiies 9 having openings or ports 7 therethrough located in staggered relation whereby is constituted a-tortuous passage for the heated products of combustion. As is obvvious, it is designed that the passage of the products of combustion to the stack flue through said chambers and portsjshall be so retarded thatmuch of the heat carried there Said leer chamber is separated from said v muflle chamber byafloor-like division wall which is of asubstantially horizontal form. In the construction of said division wall or floor I employ a plurality of transversely disposed metal beams or girders 10, prefsuitably spaced edges'of .interengaged plates 12' of refractory tile which are adapted to absorb heat i, from the products of combustion passing thereover and to impart said heat to the leer chamber a. Resting upon said. tiles 12 close to the opposite faces of theuprightweb portions of the supporting beams 10 and overlying said web portions are fire brick walls 13 upon which rest'the division walls or bafiles 9.

The hanger rods 11 are directed vertically through the arch 6, baflies 9 and beams 10 and serve to suspend the said floor of the mufile chamber and the superposed baffles from beams 14-or the like located over the furnace. Said rods are preferably formed .Wlth cross-heads 11 at their lower ends, and when they have been directed downward through alined rectangular openings'l5, 16 and 17 provided for said cross-heads in the arch 6, baflles 9 and beams 10, respectively,

they are given a .quarter turn to cause said heads to assume underlying supporting re- 'lation to said beams, transverse countersinks for thereception of said heads being preferably provided in said beams as indicated in dotted lines inFig. 1.

- When the fuel employed is natural gas,

' clean producer gas or oil, the same is preferably directed from suitable nozzles or burners, as 19, through openings 20 in the front wall to the chamber 7 of the mufile 7 which, in such case, constitutes a'combusflues, as .22, leading through said side walls from a suitable fu'rnacefas 23, in which combustion initially occurs. 7

It will .be obvious that the herein described floor or division wall which separates the muiiie and leer-chambers will not readily become distorted so as to permit leakage of gases into the leer chamber, the tiles being positively supportedin a much more substantial manner than is possible where a plurality of flues composed ofinterengaging hollow tiles disposed in arches,

; as ordinarilypis employed. Further, it is apparent thatsaid floor may be readily re-,

paired when leakage does occur, it being only necessary to replace the injured tile or other part without tearing'out and rebuilding any considerable part of the structure.

ber and a superposed muflie chamber, a sub- 1 stantially horizontal division wall separating said chambers, said wall consisting ofa plurality of spaced parallel metal beams and plate-like tiles interposed between adjacent beams and having their lateral edges sup ported by said beams, means suspending said beams, and bafiie walls'dividing said muflie chamber into a plurality of communieating chambers, said ba le walls being mounted upon said beams.

, 3. A muflie leer comprising a leer chamber and a superposed mufile chamber, a substantially horizontal division Wall separating said chambers, said wall consisting of a plurality of spaced parallel metal beams of inverted-T shape and plates of refractory material interposed between said beams andhaving their lateral edges resting upon the laterally disposed wings-of adjacent beams, and baflle walls dividing said muflie chamber into a plurality of communicating compartments, saidba-file walls being mounted upon said beams. i

4. A mufile leer comprising a leer chamber and a superposed mufiie chamber, a substantially horizontal division wall separating said chambers, said wall consisting of a plurality of spaced parallel metal beams of inverted-T shape and plates of refractory material interposed between said beams and having their lateral edges resting upon the laterally disposed wings of adjacent beams,

hanger rods suspending said beams, and a plurality of bafile walls disposed within said mufile. chamber and mounted, upon said beams, said walls having ports therethrough disposed in staggered relation whereby is formed a tortuous path for the products of combustion. 1

In testimony whereof, I affix my signature I in presence of a subscribing witness.

. HARRY M. THOMPSON.

Witness: Y W. F. KEEFER. 

